Particle | Charge (Q) | Baryon Number (B) | Strangeness (S) | Bottomness (B') | Charmness (C) | Lepton Number (L) | Spin (J) | Isospin (I, I3) |
---|---|---|---|---|---|---|---|---|
u (up quark) | +2/3 | 1/3 | 0 | 0 | 0 | 0 | 0.5 | 1/2, +1/2 |
d (down quark) | -1/3 | 1/3 | 0 | 0 | 0 | 0 | 0.5 | 1/2, -1/2 |
c (charm quark) | +2/3 | 1/3 | 0 | 0 | +1 | 0 | 0.5 | 0, 0 |
s (strange quark) | -1/3 | 1/3 | -1 | 0 | 0 | 0 | 0.5 | 0, 0 |
t (top quark) | +2/3 | 1/3 | 0 | 0 | 0 | 0 | 0.5 | 0, 0 |
b (bottom quark) | -1/3 | 1/3 | 0 | -1 | 0 | 0 | 0.5 | 0, 0 |
e- (electron) | -1 | 0 | 0 | 0 | 0 | +1 | 0.5 | 0, 0 |
νe (electron neutrino) | 0 | 0 | 0 | 0 | 0 | +1 | 0.5 | 0, 0 |
μ- (muon) | -1 | 0 | 0 | 0 | 0 | +1 | 0.5 | 0, 0 |
νμ (muon neutrino) | 0 | 0 | 0 | 0 | 0 | +1 | 0.5 | 0, 0 |
τ- (tau) | -1 | 0 | 0 | 0 | 0 | +1 | 0.5 | 0, 0 |
ντ (tau neutrino) | 0 | 0 | 0 | 0 | 0 | +1 | 0.5 | 0, 0 |
γ (photon) | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 0, 0 |
g (gluon) | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 0, 0 |
W+ (W boson) | +1 | 0 | 0 | 0 | 0 | 0 | 1.0 | 0, 0 |
W- (W boson) | -1 | 0 | 0 | 0 | 0 | 0 | 1.0 | 0, 0 |
Z0 (Z boson) | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 0, 0 |
H (Higgs boson) | 0 | 0 | 0 | 0 | 0 | 0 | 0.0 | 0, 0 |
Force | Conservation Laws | Approximate Decay Width $\Gamma$ |
---|---|---|
Strong | Colour, Isospin, Baryon number, Flavour quantum numbers, charge, spin | $\Gamma \approx 10^2 - 10^3 \ \text{MeV}$ (e.g., hadronic resonances) |
Electromagnetic | Charge, Spin, Baryon number, Total lepton number, Flavour quantum numbers | $\Gamma \approx 10^{-2} - 10^0 \ \text{MeV}$ (e.g., atomic transitions, neutral pion decay) |
Weak | Charge, Total lepton number, Baryon number | $\Gamma \approx 10^{-12} - 10^{-6}\ \text{MeV}$ (e.g., beta decay, meson decays) |